Growth of Creeping Bentgrass on a New Medium for Turfgrass Growth: Clinoptilolite Zeolite-Amended Sand
The research paper investigates the effects of clinoptilolite zeolite, a natural silicate mineral, on the growth and quality of creeping bentgrass (Agrostis palustris Huds.) when used as an amendment in sand. The study was conducted at the University of Arizona's Turfgrass Research Center, beginning in the spring of 1981. The authors hypothesized that clinoptilolite could effectively sorb ammonium (NH4+), protecting it from microbial nitrification, thereby enhancing nitrogen use efficiency in plants.
The research involved a field study where different percentages of zeolite (5% and 10%) were mixed with sand, alongside varying nitrogen application rates (25, 50, or 75 kg ha^-1). Results indicated that the addition of 5% and 10% zeolite significantly improved germination and establishment rates of the bentgrass. By August 1981, turf quality was notably enhanced with the 5% zeolite treatment. Although the 10% treatment initially did not yield better quality due to high sodium content, it eventually showed improved turf quality by January 1982.
The study also highlighted that excess nitrogen could negatively impact turf quality, leading to iron chlorosis. Clipping yields and nitrogen-use efficiency were significantly higher with zeolite amendments, and root growth was positively influenced, as indicated by increased soil organic carbon and phosphorus content in the shoots. However, phosphorus uptake was affected by nitrogen levels, showing a decrease during hot summer months but an increase in cooler temperatures. Overall, the findings suggest that clinoptilolite zeolite has potential as a beneficial medium for turfgrass growth, enhancing both growth and nutrient efficiency.
This research paper is significant in the field of agronomy and turf management as it explores innovative methods to improve turfgrass growth and nutrient efficiency. The use of clinoptilolite zeolite as a soil amendment presents a sustainable approach to enhance the quality of turfgrass while potentially reducing the environmental impact of excessive fertilizer use. The findings contribute to ongoing discussions about sustainable agricultural practices and the importance of soil amendments in optimizing plant growth. For readers, particularly those in agronomy, horticulture, and environmental science, the article offers valuable insights into alternative materials that can improve soil health and plant performance, which is crucial for both commercial turf management and ecological sustainability.
